Runner's Knee or Jumper's Knee? How to Tell, and What to Do About Each

Pesky knee pain that feels like it will never go away. Pain every time you ride. Exercise getting harder to face. If that's you, the first useful thing you can do is work out which of the two most common problems you actually have — because the treatment is different.

Step one: where is it?

• Pain below the kneecap — points toward patellar tendinitis.

• Pain underneath or around the kneecap — points toward patellofemoral pain.

Then narrow it down: hop three times on the painful leg, and separately try a deep squat. Pain with hopping leans tendon. Pain with deep squatting leans patellofemoral.

Patellar tendinitis (jumper's knee)

An overuse injury of the tendon connecting the kneecap to the shinbone. It causes pain below the kneecap, worst with jumping, running, or squatting, from repeated stress on the tendon.

Why isometrics first: holding a position without moving builds strength and reduces pain without overloading the tendon. Isometrics activate the quad while minimizing strain, improve tendon capacity, and reduce pain through neuromuscular control. They're the safest way to start loading early — and the foundation for progressing to dynamic work later.

4 sets, 45-second holds:

• Spanish squat — resistance band behind the knees, squat and hold. Targets the quads without heavily straining the patellar tendon.

• Wall sit — back against the wall, knees at 90 degrees. Strengthens the quad while keeping the knee stable.

• Decline lunge isometric hold — one foot on a decline, step back into a lunge, hold. Builds tendon resilience.

Patellofemoral pain (runner's knee)

Pain at the front of the knee, around the kneecap, when the kneecap doesn't track smoothly in its groove during running, squatting, or stairs. Usually overuse, weak muscles, or alignment. It tends to feel like a dull ache and often gets worse after sitting for a long stretch or after a lot of knee bending.

What helps:

• Banded single-leg fire hydrants — 3 x 12. Strengthens the hip abductors and improves knee alignment, taking stress off the kneecap.

• Banded single-leg squat — 3 x 12. The band encourages proper kneecap tracking while you build quad strength and control.

• Thomas stretch — 4 x 30 seconds. Targets tight hip flexors, which quietly contribute to patellofemoral pain.

Strengthening the quads, hamstrings and hips supports the kneecap and improves its tracking, which reduces friction and pain. Stretching the hip flexors and IT band relieves tension around the joint. Together they reduce strain, improve alignment, and cut the risk of it coming back.

And don't ice it

Ice masks the signal. Neither of these is an inflammation problem you can cool your way out of — they're load problems. Fix the load, build the capacity.

Want this handled properly?

If you've been doing the right exercises for six weeks and it hasn't shifted, something else is going on — and that's worth an hour of proper assessment rather than another month of guessing.

Dr. Mike Blanco, PT, DPT, Cert. DN — USAT Level 1 Certified Coach. Rival Physical Therapy, 681 Lawlins Road, Unit 110, Wyckoff, NJ. Call or text 201-220-9049.

This article is general education, not a diagnosis or individual medical advice. If pain is severe, worsening, or present at rest, get assessed in person.